how to add wave in website page code example

Example: how to add wave in website page

<div class="wave-container">  <h1>Hello, world!</h1>  <p>Check out my awesome waves!</p>  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320">    <path fill="#FFF" d="…"></path>  </svg></div>